Each question below has two blanks, each blank indicating that something has been omitted. Choose the set of words for each blank that best fits the meaning of the sentence as whole.
C can be eliminated as the verb bet should clearly be preceded by a preposition.D,can be eliminated as dangling means suspending something .The word millions here is referring to citizens and the sentence means that it would be difficult to digitalize a city with millions of people and one will face difficulties to do that.So,between A,B B is correct as teem means full of.Also, the right usage is against not into
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